According to Kevin Roose at DealBook, Garrett-Cox took an unusual step to establish herself in her role of power by decorating her office in purple. As a result, she said the men at her firm wear purple ties when they are trying to "suck up" to her.

As chief executive officer she looks after her employees, which sometimes means giving them ice cream on hot summer days.

While the chief executive role is clearly a milestone, she has a long list of accomplishments under her belt.

Earlier in her career as a hedge fund manager with Morley Fund Managers, she earned the nickname "Katherine the Great."

She's a member of the UK Society of Investment Professionals and the she's a Chartered Financial Analyst. She's also a member of the supervisory board of Deutsche Bank and serves as a director of Aviva Investors.

She graduated with her bachelor's in history with honors from Durham University.